Cannot activate eSIM profile over cellular wan

MAX BR1 Pro 5G running FW 8.5.0 build 5636.

I get error "Failed to activate eSIM profile. The WAN does not support eSIM activation. " when trying to acquire with eSIM discovery.

I understand that this is expected behavior… but will we ever be allowed to activate eSIM over cellular only connection? I can send a firmware to the modem in this way with no issue. we really need the ability to add a carrier to our modems without having to do a truck roll.

For single cellular routers like the BR1 Pro 5G, to activate the BYO eSIM feature using a cellular WAN, we recommend using an Ethernet WAN, Wi-Fi WAN, or a USB WAN. If using a cellular WAN for first time activation is necessary, Peplink eSIM must be used to activate the BYO eSIM. Physical SIM cards will not work.

To clarify @Darwing_Li points above, the br1 pro 5g does not have a usb wan, so your options are:
Ethernet wan
Wifi-as-wan 2.4 or 5ghz
Cellular (only if using peplink esim)
The reason the cellular will work work to activate another cellular is the device has to switch to the sim “slot” that can write the esims, the internal peplink esim is already another esim profile and that’s what allows it to work.